Playlist synchronisation not setting sms_media_ids
Created by: rjw57
The JWP playlist at https://dashboard.jwplayer.com/#/content/playlists/manual_detail?property=97da86aa-5780-11e7-9389-0637bffb81a3&key=n5qrW3EJ with corresponding SMS collection https://sms.cam.ac.uk/collection/692652 does not have the sms_media_ids prop set.